Heel-nailing machine



INVENTOR G. M. PETTENGILL.

HEEL 'NAIUNG MACHINE.

APPLICATION FILED JULY 30.1918.

Patented July 6, 1920.

George A1. Peffenglll UNITED STATES PATENT orr cn."

GEORGE M. PETTENGILL, 0F HAVERI-IILL, MASSACHUSETTS, ASSIGNOR T0 HAMEL SHOE MACHINERY COMPANY, A CORPORATION OF MASSACHUSETTS.

HEEL-NAILING MACHINE.

Specification of Letterslatent.

Patented July 6, 1920.

, "Application filed July 30, 1918. Serial No. 247,352.

To all whom it may concern:

Be it known that I, GEORGE M. Pn'rrnn- GILL a citizen of the United States, residing at lfaverhill, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Heel- Nailing Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to heel nailing machines and particularly to that type in which a reciproeatory cross head provided with a rotary turret is employed.

More specifically the present invention comprises improvements particularly adapted for use in connection with that form of heel nailing machine disclosed in the patent to Pettengill, 1,119,763, December 1, 1914:, and in which the rotatable turret is held locked in either of two operative positions but is unlocked and turned from one to the otherot' said positions bytheoperator. In the above machine the unlocking and looking of the turret is performed manually and in connection with the carrying out of another operation, the present invention not being specifically concerned with this feature of the prior device but relating entirely .to means for automatically turning the turret after the same has been unlocked.

The invention consists in furnishing the machine with a rotatable turret so arranged that it tends, when unrestrained, to turn to one of its operative positions, combined with automatically operating devices for moving the turret to another of its operative positions.

The invention also consists in providing resiliently acting means for turning the turret in one direction, means for returning it, and power actuated means for resetting said resilient means preparatory to a second actuation of the turret thereby. g

Another feature of the invention consists in the provision of means automatically aet ing to disengage the turret turning means from the turret upon completion of the turning operation.

Other and further objects and advantages of the invention together with improved details of construction and combinations of in the specification and particularly pointed out in the claims, reference being had to' ferred embodiment thereof and in which,'

Figure 1 is an elevational view of the mechanism constituting the invention as applied to a machine oi? the class described, so much only of the latter being shown as is necessary for an understanding of the present device, and

Fig. 2 is a plan view of the parts shown in Fig. 1. i

1 indicates a portion of the frame of a machine providing a vertical guideway for a rod 2, reciprocable therein, said rod, to gether with a similar rod upon the opposite side of the machine, and not herein shown, having connected to its upper end a cross head 3. At the central portion of the cross head is a transversely extending rotatable shaft 4, having fixed thereon a turret 5 providing divergent arms 6, 7 said arms being intended for holding the spanker block and the nail-driving holder, respectively; The arm 6 is somewhat longer than the arm 7 as will appear from comparison of the dotted-line position of the latter with the full-lines showing the arm 6 in Fig. 1, the metal provided by the additional length of the arm 6 serving as a weight which tends to turn the turret to the position shown in Fig. 1, it being evident, however, that, if desired, these arms might be made of substantially the same length with a spring of auxiliary weight for swinging the turret in the manner above noted.

Fixed upon the forwardly extending end of the shaft 1 and outside the forward sur- "face of the cross head 3, is a flange 8, said fiange being provided with a pair of spaced apart notches 9 and 10 with WlllCh a spr1ngpressed, slidable bolt 11 is adapted to have locking engagement, the relation of said notches 9 and 10 being such that engagement of the bolt 11 therewith serves to hold the turret fixed with relation to the cross head in proper position for employment of either the spanking or nail-driving devices. The mechanism as hereinbetore described is all old and well known in the patent to Pettengill, above noted, to which, patentreference may be had for a fuller disclosnre of the same. a l

At a point substantially diametrically opposits the notches 9 and 10, the flange, 8 is provided with an elongated slot 12 forming ing the turret in fixed position, and the a shoulder at 13. Projecting outwardly from the forward face of the cross head at 14 is a pivot pin or bolt upon which is swingingly'mounted a lever 15, one end 16 of which extends in the direction of theturret and has pivoted upon its extremity by means of apin 17, a pawl 18. The pawl 18 has a downwardl iro'ectin arm 19 to y l a:

which is connected one end' of a tension '25 projecting forwardly'fi'om the 'face of the crosshead,said roll lying in the path of movement of said cam surface 23 and serving upon contact of the latter therewith to move said pawl outwardly away. from the flange 8, whereby to "disengagesaid shoulders 22 andlia. 26 'is a coiled tension spring connected atone end to a pin 27 fast in the lever arm 16, and atits opposite end to an eye formed in the extremity of a screw 29 adustable in a bracket 30 carried upon the cross head by means of a nut 31 having engagement I with the "upper end of said screw. The lever 15 is provided with an arm 32 extending oppositely to the arm 16,

said arm 32 lying in the vertical plane of a roll 33 pivotally supported upon the upper extremity of a bracket 34 carried by the frame member 1. r The operation ofthe device is as follows, it being understood that as shown in Fig; 1 the machine is illustrated with theparts in the position in which they are left at the end of the up-stroke of the cross head Ifol- I lowing the spanking stroke thereof, the bolt 11 engaging within the notch 10 still holdshoulder 22 of the pawl 18 being in engagement with the shoulder 13 of the notch 12, thereby holding the lever arm 16in clownwardly inclined pvosition with the spring 26 under tension. 7 heoperator new releases the bolt 11, by mechanism not hereinshown, but fully illustrated in the patent above"referred to, whereupon the tension of spring 26 acting through lever arm 16, ,and the pawl 18 acts to turn the turret until the notch 9 is brought opposite the bolt 11, whereupon the latter snaps into the notch 9 holding the turret in position for perform ing the nailing stroke. 7 'During the 'final portion of the movement of the turret the cam surface 23 engages the eccentric roll 24,

thereby disengaging the shoulder 22 from the shoulder 13, thus permitting freeiturning movement of the turret upon a further retraction of the bolt 11.

e The cross head now descends to perform the pawl.

its nailing stroke, and. the lever arm 32, which 1s now in the dotted-line position shown in Fig. 1, contacts with the roll 33 and is thereby swung into the position by contact with the eccentric roll 24'. The

operator now again releases the bolt 11, whereupon the weight "of the arm 6 of the turret serves toswing the same downwardly from the dotted-line position, shown at 35 in Fig. 1, to the full-line position thereof, the bolt 11 again enteringthe notch 10 to fix the turret in operative. position. The cross head now descends on the spanking stroke, and the lever. arm 32 again contacts with the roll 38 swinging the arm 16 down into the full-line position, and atthis time the shoulder 22 ofthe. pawl 18 snaps be neath the shoulder 13' of the notch 12 due to the action of the spring 20, thuslocking the pawl and the lever 16 in position as shown in Fig. 1, the cross head now. returning to its upper position ready to repeat the above cycle of movements' Having thus described the invention and the mode of operation of the same, what I claim and desire to secure by Letters Pat ent of the United States is,

1.]In' a machinefof the cla'ss'described, a rotatable turret, means, for lock-ing said turret in eitheroif a plurality of operative positions, means tending to turn the turret into one offsa'id operative positions when removed therefrom, and automatically acting means for moving said turret to another of its operative positions against the tendency of said first means.

'2. In a machine of the class described,

anoscillatable turret, means for locking said turretln either of two operative 'positlons, gravity means'tendl'ng to turn sald turret spring means for'moving it to its other op- .erative position.

4. In a machine ofthe class described,

an oscillatable turret, locking means for said turret and-turning means for the turret, said turning means comprising aratchet member fastto, the turret,a' pawl engageable withthe ratchet memberfor turning the same,

5. In aomachine of the class described,

anoscillatable' turret, a ratchet fastto t'he into one of its operative positions, and

and resilient means for actuating turret, a pawl engageable with said ratchet,

means for actuating said pawl to turn the ratchet, and means for disengaging said pawl and ratchet upon completion of the turning movement.

6. In a heel nailing machine, in combination, an oscillatable turret, a ratchet fast to the turret, a pawl carrier, a pawl pivoted thereto, spring means tending to engage said pawl with the ratchet, means for actuating the pawl carrier whereby to turn the ratchet, and cam means for disengaging said pawl from the ratchet upon completion of the turning movement.

7. In a heel nailing machine having a reciprocating cross head, in combination, a turret rotatable upon the cross head, means for locking the turret in either of a plurality of operative positions, a ratchet fast to the turret, a pawl for driving the ratchet to turn said turret in one direction, adjustable resilient means for actuating said pawl, means operative upon reciprocation of the cross head for tensioning said resilient means, and means for turning said turret in the reverse direction.

8. In a heel nailing machine having a reciprocatory cross head, in combination, an oscillatable turret, a ratchet fast thereto, a

lever pivoted upon the cross head, a pawl mounted upon one end of the lever and ar ranged for engagement with said ratchet, a spring tending when under tension to swing said lever and thereby, through the pawl and ratchet, to turn the turret, and a fixed member arranged, upon downward movement of the cross head, to contact with the opposite end of said lever and thereby to tension the spring.

9. In a heel nailing machine having a re ciprocating cross head, a turret rotatable thereon, a ratchet fast to the turret, a lever pivoted to said cross head and provided with a pawl engageable with the ratchet, a coil spring connected to said lever and tending when under tension to swing said lever and thereby through said pawl and ratchet to turn the turret, a roll mounted upon a fixed support for engagement with the lever upon downward movement of the cross head to thereby tension said spring, a cam carried by said pawl, and an adjustable stop carried by the cross head, contact of said cam and stop acting to disengage said pawl and ratchet.

In testimony whereof I have signed my name to this specification.

GEORGE M. PETTENGILL. 

